Scientists have been working on imitating nature’s ability to photosynthesize the sun’s energy, much as plants turn that energy into food for their health and growth. Daniel Nocera, for instance, created an artificial leaf that split water into oxygen and hydrogen that could fire up a small fuel cell and run an electric light. According to a Science Pub lecture your editor recently attended, an eight-ounce glass of water can power a 60-Watt bulb for 20 hours. Nocera, in a Pop! Tech talk, claims an Olympic-size swimming pool could supply all the world’s energy needs. Nocera now works at Harvard, but researchers at Massachusetts Institute of Technology (MIT), his former home, are taking his work further, detailing all the limitations …